Seismic Performance Analysis And Research Of Laminated Plate Shear Wall With Interface Frictional Sliding

Recently,housing industrialization has developed rapidly under the country vigorously promote building energy saving and building assembly.Based on the introduction and absorption of foreign new technology and the theory of building seismic design in China,the seismic performance of a new type of composite slab shear wall structure is systematically studied.The structure consists of two pre-poured concrete wallboards connected by triangular hook lattice steel bars.After being transported to the construction site,the precast concrete wallboards are used as templates to pour concrete in the sandwich layer,and form a whole with the building structure through horizontal and vertical connection structures.According to the research of this special fabricated shear wall structure,it is found that when concrete is poured in the sandwich layer between the two precast wall panels on the outside.There is a contact surface between the old and new concrete,that is,the composite surface.In order to study the influence of complex stress state and stress transfer at the composite surface on the seismic performance of composite plate shear wall structure,the failure mechanism of the structure is explored under the action of low-cycle reciprocating load by setting up eight groups of finite element models with different contact relationships with ABAQUS,a finite element software which can simulate the nonlinear relationship well,and referring to the test data based on the failure criterion and damage theory of the nonlinear theory of concrete.Comparing the numerical simulation results with the experimental data,it is found that there is friction slip between precast concrete and cast-in-place concrete due to the existence of composite surface.The deformation and failure of composite wallboard is earlier than that of wallboard without considering contact friction.By comparing with the failure mode of cast-in-place shear wall,it is found that the middle post-cast concrete part is earlier than that of precast wallboard.The research results show that when the friction slip of the superimposed surface is considered,the seismic performance and failure mode of composite slab shear wall are more consistent with the actual situation.Considering comprehensively increasing the friction coefficient of the composite surface,that is,adopting appropriate structural measures for the composite surface in practice,the seismic performance of the composite wallboard can be improved,and the integrity is stronger,and the seismic performance is almost consistent with that of the full cast-in-place shear wall,so the design and construction can be carried out with reference to the current cast-in-place concrete code in China.Combined with the actual project of "Tianmen Lake Public Rental Housing in Hefei Economic and Technological Development Zone",an 18-floor numerical calculation model of composite slab shear wall structure is established,and the dynamic time hifloor analysis is carried out under the action of a large earthquake（rare earthquake）,and 10 seismic waves with a 50-year transcendence probability of 2% are selected for simulation in order to study the seismic performance of composite slab shear wall structure.A group of cast-in-place shear wall structures are set up to compare with composite slab shear wall structures.The results show that the composite slab-shear wall structure can show its reliable integrity to a certain extent under the influence of strong earthquakes,and it can be seen that the seismic performance of the whole cast-in-place shear wall structure is equivalent to that of the whole cast-in-place shear wall structure.The weak parts of the 18-floor composite slab shear wall structure are roughly from 10 to 15 floors,so it is necessary to improve the lateral stiffness of these floors,such as increasing the cross-sectional area of members or improving the grade of steel bars,adjusting the plane structure layout and so on.It is found that there is almost no difference in top floor displacement,inter-floor displacement angle and apex acceleration between the whole cast-in-place shear wall structure and the composite slab shear wall structure under strong earthquake,which shows that the seismic performance of the composite slab shear wall structure under dynamic time hifloor analysis can be equivalent to the full cast-in-place shear force walls.Figure [58] Table [18] Reference [66]...